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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1615 (BATTERY, CHARGING SYSTEM AND STARTING SYSTEM)REPAIR INSTRUCTIONSAUXILIARY BATTERY POSITIVE CABLE REPLACEMENTREMOVAL PROCEDURE
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Removal Procedure

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Removal Procedure
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Under Hood Junction Block Cover
    GM1702793Courtesy of GENERAL MOTORS CORP.
  1. Disconnect the auxiliary battery negative cable. Refer to Battery Negative Cable Disconnection and Connection (With Single Battery) , Battery Negative Cable Disconnection and Connection (With Auxiliary Battery)  or Battery Negative Cable Disconnection and Connection (With Dual Batteries) .
  2. Remove the underhood junction block cover.
    3. Fig 2: View Of Junction Block & Retainers
    GM1702795Courtesy of GENERAL MOTORS CORP.
  3. Lift the junction block retainers from the locked position (3) and rotate the retainers to the open position (1).
  4. Remove the junction block.
    5. Fig 3: View Of Positive Battery Cable Connector & (UBEC)
    GM1702797Courtesy of GENERAL MOTORS CORP.
  5. Remove the auxiliary battery positive cable connector (1) from the underhood bussed electrical center (UBEC).
    6. Fig 4: View Of Fuse Cover & Connectors
    GM1857176Courtesy of GENERAL MOTORS CORP.
  6. Remove the mega fuse cover (3).
  7. Disconnect the auxiliary battery positive cable electrical connector (2) from the engine wiring harness connector.
  8. Remove the relay (1) clip from the stud on the front of dash.
    9. Fig 5: View Of Positive Cable Nut, Jumper Cable Terminal & Fuse Nut
    GM1857184Courtesy of GENERAL MOTORS CORP.
  9. Remove the auxiliary battery positive cable nut (1) from the mega fuse holder.
  10. Remove the generator battery jumper cable nut (3) from the mega fuse holder.
  11. Remove the generator battery jumper cable terminal (2) from the mega fuse stud.
  12. Remove the auxiliary battery positive cable from the mega fuse holder.
    13. Fig 6: View Of Battery Cable Nuts, Retainers & Bolts
    GM1857177Courtesy of GENERAL MOTORS CORP.
  13. Disconnect auxiliary battery positive cable electrical connector (1) from the auxiliary battery relay.
  14. Reposition the auxiliary battery positive cable boot (5).
  15. Remove the auxiliary battery positive cable nut (4) and cable from the battery relay.
  16. Remove the auxiliary battery positive cable retainer (2) from the stud on the front of dash.
  17. Remove the auxiliary battery positive cable push nuts (6).
    18. Fig 7: View Of Auxiliary Battery Positive Cable
    GM1857381Courtesy of GENERAL MOTORS CORP.
  18. Remove the auxiliary battery positive cable from the vehicle.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.